Here is an updated picture after a total of 14K miles total since I started the experiment using HPM EC and HPL oils, I also did the BG EPR flush during the same duration to help things along.
As can be seen there is still varnish left, however what is interesting, is there were multiple chunks of carbonaceous material, about the size of rice grains that were left on the side of the oil drain caddy during this last oil change. I wish I had a pictures and over the last 3K miles, no noticeable oil consumption.
For this next OCI, I used the last quart of my EC + RGT 5w-30 and will run it for another 3-4K miles if there is again no noticeable usage by next OCI, I will run BG EPR again then put in HPL for an extended period.
I think the ring groves must have gotten some cleaning this last cycle since the carbon can not come from the pan or valve cover since those were cleaned those thoroughly during the pan reseal and valve adjustment.
I want to see if and how long to get the engine back to spotless. Every OCI will either have and EC, HPL oil until engine is spotless.
View attachment 168765